include/linux/cpu_cooling.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  *  linux/include/linux/cpu_cooling.h
   4  *
   5  *  Copyright (C) 2012  Samsung Electronics Co., Ltd(http://www.samsung.com)
   6  *  Copyright (C) 2012  Amit Daniel <amit.kachhap@linaro.org>
   7  *
   8  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   9  *
  10  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  11  */
  12
  13 #ifndef __CPU_COOLING_H__
  14 #define __CPU_COOLING_H__
  15
  16 #include <linux/of.h>
  17 #include <linux/thermal.h>
  18 #include <linux/cpumask.h>
  19
  20 struct cpufreq_policy;
  21
  22 #ifdef CONFIG_CPU_THERMAL
  23 /**
  24  * cpufreq_cooling_register - function to create cpufreq cooling device.
  25  * @policy: cpufreq policy.
  26  */
  27 struct thermal_cooling_device *
  28 cpufreq_cooling_register(struct cpufreq_policy *policy);
  29
  30 /**
  31  * cpufreq_cooling_unregister - function to remove cpufreq cooling device.
  32  * @cdev: thermal cooling device pointer.
  33  */
  34 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev);
  35
  36 #else /* !CONFIG_CPU_THERMAL */
  37 static inline struct thermal_cooling_device *
  38 cpufreq_cooling_register(struct cpufreq_policy *policy)
  39 {
  40         return ERR_PTR(-ENOSYS);
  41 }
  42
  43 static inline
  44 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
  45 {
  46         return;
  47 }
  48 #endif  /* CONFIG_CPU_THERMAL */
  49
  50 #if defined(CONFIG_THERMAL_OF) && defined(CONFIG_CPU_THERMAL)
  51 /**
  52  * of_cpufreq_cooling_register - create cpufreq cooling device based on DT.
  53  * @policy: cpufreq policy.
  54  */
  55 struct thermal_cooling_device *
  56 of_cpufreq_cooling_register(struct cpufreq_policy *policy);
  57 #else
  58 static inline struct thermal_cooling_device *
  59 of_cpufreq_cooling_register(struct cpufreq_policy *policy)
  60 {
  61         return NULL;
  62 }
  63 #endif /* defined(CONFIG_THERMAL_OF) && defined(CONFIG_CPU_THERMAL) */
  64
  65 #endif /* __CPU_COOLING_H__ */